package com.itheima.mapper;

import com.itheima.doman.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface DeptMapper {
    @Select("select id, name, create_time, update_time from dept order by update_time desc ")
    List<Dept> selectAll();

    @Delete("delete from dept where id=#{id}")
    void deleteById(Integer id);

    @Insert("insert into dept(name, create_time, update_time) values (#{name},#{createTime},#{updateTime})")
    void insertDept(Dept dept);

    @Select("select id, name, create_time, update_time from dept where id=#{id}")
    Dept selectById(Integer id);

    @Update("update dept set name=#{name},update_time=#{updateTime} where id=#{id}")
    void updateDept(Dept dept);

    @Select("select count(*) from emp e left join dept d on e.dept_id = d.id where d.id=#{id}")
    Integer countEmpByDeptId(Integer  id);
}
